COFF: Do not assign linker-weak symbols to selectany comdat sections.
[oota-llvm.git] / cmake / modules / VersionFromVCS.cmake
1 # Adds version control information to the variable VERS. For
2 # determining the Version Control System used (if any) it inspects the
3 # existence of certain subdirectories under CMAKE_CURRENT_SOURCE_DIR.
4
5 function(add_version_info_from_vcs VERS)
6   string(REPLACE "svn" "" result "${${VERS}}")
7   if( EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.svn" )
8     set(result "${result}svn")
9     # FindSubversion does not work with symlinks. See PR 8437
10     if( NOT IS_SYMLINK "${CMAKE_CURRENT_SOURCE_DIR}" )
11       find_package(Subversion)
12     endif()
13     if( Subversion_FOUND )
14       subversion_wc_info( ${CMAKE_CURRENT_SOURCE_DIR} Project )
15       if( Project_WC_REVISION )
16         set(SVN_REVISION ${Project_WC_REVISION} PARENT_SCOPE)
17         set(result "${result}-r${Project_WC_REVISION}")
18       endif()
19     endif()
20   elseif( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git )
21     set(result "${result}git")
22     # Try to get a ref-id
23     if( EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.git/svn )
24       find_program(git_executable NAMES git git.exe git.cmd)
25       if( git_executable )
26         set(is_git_svn_rev_exact false)
27         execute_process(COMMAND ${git_executable} svn log --limit=1 --oneline
28           WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
29           TIMEOUT 5
30           RESULT_VARIABLE git_result
31           OUTPUT_VARIABLE git_output)
32         if( git_result EQUAL 0 )
33           string(REGEX MATCH r[0-9]+ git_svn_rev ${git_output})
34           string(LENGTH "${git_svn_rev}" rev_length)
35           math(EXPR rev_length "${rev_length}-1")
36           string(SUBSTRING "${git_svn_rev}" 1 ${rev_length} git_svn_rev_number)
37           set(SVN_REVISION ${git_svn_rev_number} PARENT_SCOPE)
38           set(git_svn_rev "-svn-${git_svn_rev}")
39
40           # Determine if the HEAD points directly at a subversion revision.
41           execute_process(COMMAND ${git_executable} svn find-rev HEAD
42             WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
43             TIMEOUT 5
44             RESULT_VARIABLE git_result
45             OUTPUT_VARIABLE git_output)
46           if( git_result EQUAL 0 )
47             string(STRIP "${git_output}" git_head_svn_rev_number)
48             if( git_head_svn_rev_number EQUAL git_svn_rev_number )
49               set(is_git_svn_rev_exact true)
50             endif()
51           endif()
52         else()
53           set(git_svn_rev "")
54         endif()
55         execute_process(COMMAND
56           ${git_executable} rev-parse --short HEAD
57           WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
58           TIMEOUT 5
59           RESULT_VARIABLE git_result
60           OUTPUT_VARIABLE git_output)
61         if( git_result EQUAL 0 AND NOT is_git_svn_rev_exact )
62           string(STRIP "${git_output}" git_ref_id)
63           set(GIT_COMMIT ${git_ref_id} PARENT_SCOPE)
64           set(result "${result}${git_svn_rev}-${git_ref_id}")
65         else()
66           set(result "${result}${git_svn_rev}")
67         endif()
68       endif()
69     endif()
70   endif()
71   set(${VERS} ${result} PARENT_SCOPE)
72 endfunction(add_version_info_from_vcs)